The Secondary Optical Design and Fabrication for the Uniform Illuminating LED Spotlight Using TIR Lens

¹ School of Opto-electronics and Communication Engineering, Xiamen University of Technology, Xiamen 361024, China
² Fujian Provincial Key Laboratory of optoelectronic information materials and devices, Xiamen University of Technology, Xiamen 361024, China

^a Corresponding author: ycxu@xmut.edu.cn

Abstract

Different with the fact that the traditional imaging optics emphasizes its ability to get clear image on the image plane, the purpose of LED illumination design is to meet the requirement of high availability of optical energy and homogeneity of illumination. As the study object, the LED track lighting has been designed with secondary optical design by the Lighttools design software. After using TIR lens which has two ways of concentrating: reflectors and lenses, the exit light of the spotlight will be adjusted and the illuminated surface will be with high homogeneity. Therefore, it will reduce the harm of the light to human’s eyes. In this study, the LED spotlights have been produced and tested with the corresponding test results: Lighting power is 7W, luminous efficiency is 82.57lm/W, color rendering index is 83.7, the main wavelength is 488.2nm, the ratio of red, green, blue is 13.1: 83.0: 3.9.